I think this thread brings up an interesting thought. So many words can describe the same thing. Personally, I feel that soul is the most defining word for music. Expression works, but what are is the music expressing? The musicians soul. It's what drives so many people in this life, and gives us hope, and happiness.

I love all the places that music can take you in your mind. It can cut through the years and take you back to a place in your past or it can set a new bench mark for you to revisit in the future. Music is a powerfull thing. A little corny and alot more than one word but that is what music is to me.